Alert archive / Washington / Snow Advisories in 2007

Snow Advisory 36, NWS Spokane, WA

December 27, 200713 counties in Washington; 5 counties in Idaho

NWS Spokane, WA issued this snow advisory at Dec 27, 2007, 4:04 AM PST for 13 counties in Washington; 5 counties in Idaho. It took effect at Dec 27, 2007, 10:00 AM PST. It was in force for 29 hr.

The area

The counties it named.

The facts

Issued: Dec 27, 2007, 4:04 AM PST (12:04 UTC)
In effect from: Dec 27, 2007, 10:00 AM PST
Expired: Dec 28, 2007, 3:12 PM PST
In force: 29 hr
Issued by: NWS Spokane, WA

Counties Bonner County, ID, Boundary County, ID, Kootenai County, ID, Lewis County, ID, Nez Perce County, ID, Adams County, WA, Asotin County, WA, Chelan County, WA, Douglas County, WA, Ferry County, WA, Garfield County, WA, Grant County, WA, Lincoln County, WA, Okanogan County, WA, Pend Oreille County, WA, Spokane County, WA, Stevens County, WA, Whitman County, WA

The radar

The Spokane radar (KOTX), 27 km from the middle of the area, began a volume at 12:06 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Boise Airport, ID (KBOI), launched 12:00Z, 0.1 hours before the alert went out and 462 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 836 m above ground
0-6 km bulk shear: 74 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this snow advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Spokane, WA wrote its last area forecast discussion before this snow advisory went out at Dec 26, 2:41 PM PST, 13 hours 23 minutes earlier.

Area forecast discussion, Dec 26, 2:41 PM PST, 13 hours 23 minutes before

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Hazardous weather outlook, Dec 26, 2:14 PM PST, 13 hours 50 minutes before

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<body>
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

Everything else NWS Spokane, WA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 27, 2:42 PM PST	Heavy Snow Warning	OTX	Benewah, Kootenai, Latah, Shoshone	37 hr

Nearby

Snow Advisories in Washington, 2007 Snow Advisories in Idaho, 2007 Every snow advisory in 2007

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.